internal: remove unused util functions (#871)

The functions util.Sorted and util.KeySlice are unused.

internal/util/errors.go

@@ -0,0 +1,16 @@
+// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package util
+
+import (
+	"fmt"
+)
+
+// Wrapf wraps *errp with the given formatted message if *errp is not nil.
+func Wrapf(errp *error, format string, args ...any) {
+	if *errp != nil {
+		*errp = fmt.Errorf("%s: %w", fmt.Sprintf(format, args...), *errp)
+	}
+}

internal/util/util.go

@@ -1,44 +0,0 @@
-// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
-// Use of this source code is governed by an MIT-style
-// license that can be found in the LICENSE file.
-
-package util
-
-import (
-	"cmp"
-	"fmt"
-	"iter"
-	"slices"
-)
-
-// Helpers below are copied from gopls' moremaps package.
-
-// Sorted returns an iterator over the entries of m in key order.
-func Sorted[M ~map[K]V, K cmp.Ordered, V any](m M) iter.Seq2[K, V] {
-	// TODO(adonovan): use maps.Sorted if proposal #68598 is accepted.
-	return func(yield func(K, V) bool) {
-		keys := KeySlice(m)
-		slices.Sort(keys)
-		for _, k := range keys {
-			if !yield(k, m[k]) {
-				break
-			}
-		}
-	}
-}
-
-// KeySlice returns the keys of the map M, like slices.Collect(maps.Keys(m)).
-func KeySlice[M ~map[K]V, K comparable, V any](m M) []K {
-	r := make([]K, 0, len(m))
-	for k := range m {
-		r = append(r, k)
-	}
-	return r
-}
-
-// Wrapf wraps *errp with the given formatted message if *errp is not nil.
-func Wrapf(errp *error, format string, args ...any) {
-	if *errp != nil {
-		*errp = fmt.Errorf("%s: %w", fmt.Sprintf(format, args...), *errp)
-	}
-}